|Publication number||US4091348 A|
|Application number||US 05/775,531|
|Publication date||May 23, 1978|
|Filing date||Mar 8, 1977|
|Priority date||Mar 12, 1976|
|Also published as||DE2710458A1|
|Publication number||05775531, 775531, US 4091348 A, US 4091348A, US-A-4091348, US4091348 A, US4091348A|
|Inventors||Tamio Kawamoto, Asao Takahashi, Hiroshi Toyota|
|Original Assignee||Nissan Motor Company, Ltd.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (5), Classifications (12)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present invention relates to a solenoid device for an electromagnetically operated valve.
In a solenoid device for an electromagnetically operated valve of the type having a plunger mounted for reciprocal movement along a coil, the plunger is supported by a yoke which supports the coil within a casing of the type of solenoid device. With this solenoid device there is a problem in that contacting areas on the plunger and the yoke will wear at a fast rate.
It is an object of the present invention to provide a solenoid device which eliminates the problem above.
According to the present invention, a solenoid device is provided with bearing members attached to a casing to slidably support a plunger. The plunger is slidably supported at a push pin secured to one end thereof plunger and at an axle shaft formed on the other end thereof.
The invention will be further described hereinafter with reference to the accompanying drawings, in which:
FIG. 1 is a side view of an electromagnetically operated valve incorporating a solenoid device according to the present invention, showing in section the construction of a valve section of the valve; and
FIG. 2 is a half sectional view of the solenoid device which has been removed from the valve section of the electromagnetically operated valve shown in FIG. 1.
Referring to FIG. 1 of the accompanying drawings, there is shown an electromagnetically operated on-off valve 1 employing as its actuator a solenoid device 2 of the invention. A valve body 3 of the valve 1 is formed with an inlet port 4 and an outlet port 5. Formed within the valve body 3 are two different diametral counterbores 6 and 7. The inlet port 4 is open to a smaller diametral bore 6 and the outlet port 5 to a larger diametral bore 7 so that the inlet port 4 is connected to the outlet port 5 through the two counterbores 6 and 7. A valve member 8 is movably disposed within the larger bore 7 and is urged towards the smaller bore 6 against a shoulder between the larger and smaller bores by a compression spring within the larger bore 7, thus normally preventing flow communication between the inlet and outlet ports 4 and 5. The compression spring 9 is retained between two spring retainers 10. A force for biasing the valve member 8 can be adjusted by turning an adjusting screw 12 extending through an end plug closing the larger bore 7. An O-ring seal seals between the valve and solenoid.
A plurality of screws secure the solenoid device 2 to the valve body 3. The solenoid device 2, as shown in FIG. 2, comprises a casing 14, a coil 15 disposed within the casing 14, a yoke 16 supporting the coil 15 and a plunger 17 surrounded by the yoke 16 and mounted for reciprocal movement. A push pin 18 is formed on one end of the plunger 17. Two terminals 19 are provided to connect the coil 15 electrically to a source of electricity.
The plunger 17 has formed at one end thereof an axle shaft 20. The shaft 20 and the push pin 18 of the plunger 17 are supported by bearing members 23 and 24 attached to the casing 14. Preferably, each of the bearing members takes the form of a thrust bearing using a porous bearing metal in consideration of limited space for attachment and difficulty in lubricant oil supply.
Attached to a shoulder 25 for abutment of the plunger 17 disposed on the side of the push pin 20 and to a shoulder 26 disposed on the side of the axle shaft 18 are dampening members 27 and 28, respectively, which are preferably made of a rubber, or synthetic resin or a leather or a cloth or the like.
Although not shown, another two dampening members may be attached to opposite shoulders 29 and 30 of the casing 14 to the shoulders 25 and 26, respectively.
When, in operation, the solenoid 2 is energized, the plunger 18 moves upwardly as seen towards the side of the push pin 18 until the shoulder 25 of the plunger 17 comes into abutting engagement with the opposite shoulder 29 of the casing 14. The provision of the dampening members 27 will act not only to dampen shock upon abutting engagement between the two shoulders 25 and 27 but also to prevent occurence of vibration upon such abutting engagement.
During this upward movement of the plunger 17 when the solenoid 15 is energized the push pin 18 urges the valve member 8 against the bias of the compression spring 9 to open the valve member 8, permitting flow from the inlet port 4 to the outlet port 5 through the two counterbores 6 and 7.
When the solenoid is deenergized, the compression spring 9 urges the plunger 17 downwardly as seen until the shoulder 26 comes into abutting engagement with the opposite shoulder 30 of the casing 14. Shock and vibration upon this abutting engagement are likewise prevented by the dampening member 28.
The reciprocal movement as above of the plunger 17 can be performed smoothly by means of the bearing members 23 and 24. The provision of such bearing members 23 and 24 prevent wear between the plunger 17 and the yoke 16, between the push pin 18 and the guide member 22 and between the axle shaft 20 and the guide member 21.
It will now be appreciated that according to the present invention, parts' wear of the solenoid device and noise and vibration during reciprocal movement of the plunger are prevented, prolonging the life of the solenoid device.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2735047 *||Oct 2, 1953||Feb 14, 1956||Antivibration solenoid structure|
|US3396354 *||Sep 1, 1966||Aug 6, 1968||Deltrol Corp||Solenoid with plunger|
|US3501724 *||May 2, 1968||Mar 17, 1970||Stearns Electric Corp||Impact cushioning solenoid yoke and frame mounting|
|US3510814 *||May 31, 1968||May 5, 1970||Automatic Switch Co||Solenoid operator having armature provided with guide rings|
|US3735302 *||Jan 3, 1972||May 22, 1973||Bosch Gmbh Robert||Electromagnet|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4668023 *||Aug 9, 1985||May 26, 1987||Kelsey-Hayes Company||Control valve for an anti-lock brake system|
|US4790607 *||Jun 15, 1987||Dec 13, 1988||Kelsey Hayes Company||Vehicle anti-lock brake system|
|US4865399 *||Dec 13, 1988||Sep 12, 1989||Kelsey Hayes Company||Vehicle anti-lock brake system|
|US4886322 *||Dec 13, 1988||Dec 12, 1989||Kelsey Hayes Company||Vehicle anti-lock brake system|
|US5065786 *||Apr 10, 1990||Nov 19, 1991||Monogram Sanitation, A Division Of Mag Aerospace Industries, Inc.||Flow control valve|
|U.S. Classification||251/129.15, 335/262, 335/277|
|International Classification||H01F7/08, F16K31/06, H01F7/16|
|Cooperative Classification||H01F7/088, F16K31/0655, H01F7/1607|
|European Classification||F16K31/06C6, H01F7/16A, H01F7/08B|